Shock absorbing caster



FIG. 1 is a shock absorbing caster embodying the ornamental design constituting my invention;

FIG. 2 is a rear view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left-side elevational view of FIG. 1, which is identical to the right-side elevational view; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a shock absorbing caster, as shown and described. 